JP5086236B2 - Portable radio - Google Patents

Portable radio Download PDF

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Publication number
JP5086236B2
JP5086236B2 JP2008502744A JP2008502744A JP5086236B2 JP 5086236 B2 JP5086236 B2 JP 5086236B2 JP 2008502744 A JP2008502744 A JP 2008502744A JP 2008502744 A JP2008502744 A JP 2008502744A JP 5086236 B2 JP5086236 B2 JP 5086236B2
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Prior art keywords
antenna
circuit board
antennas
receiving antenna
housing
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JPWO2007099859A1 (en
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忠司 小山
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Kyocera Corp
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Kyocera Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)

Description

本発明は、２つのアンテナを有するダイバーシティ型の携帯無線機に関する。   The present invention relates to a diversity type portable radio device having two antennas.

携帯電話機等の携帯無線機は、２つのアンテナを有し、このアンテナで受信した同一の受信信号について、電波状況の優れたアンテナの信号を優先的に用いたり、２つのアンテナの受信信号の合成の重み付けを変化させたりするダイバーシティ技術を適用した携帯無線機が普及しつつある。   A portable wireless device such as a cellular phone has two antennas, and for the same received signal received by this antenna, an antenna signal with excellent radio wave condition is used preferentially, or the received signals of the two antennas are combined. Portable wireless devices to which diversity technology that changes the weighting of the mobile phone is applied are becoming widespread.

また、携帯無線機では、デザイン上の要請等から、アンテナを筐体内に内蔵したものが主流になりつつある。例えば、折り畳み式の携帯電話機において、キー操作部を有する筐体内にアンテナを内蔵したものが提案されている（特許文献１参照）。
日本特許公開公報、特開２００３−８３２０号 Also, portable radio devices are becoming mainstream due to design requirements and the like, in which an antenna is built in a housing. For example, a foldable mobile phone has been proposed in which an antenna is incorporated in a casing having a key operation unit (see Patent Document 1).
Japanese Patent Publication, JP2003-8320A

ところで、ダイバーシティ型の携帯無線機では、２つのアンテナの距離が近接するとアンテナ間の干渉が生じてアンテナ効率が劣化してしまうことから、２つのアンテナを十分に離す必要がある。   By the way, in the diversity type portable wireless device, if the distance between the two antennas is close, interference between the antennas occurs and the antenna efficiency is deteriorated. Therefore, it is necessary to sufficiently separate the two antennas.

しかしながら、携帯無線機の小型化の要請から、２つのアンテナを近接した位置に配置せざるを得ない場合が少なくない。この場合、上述したように、２つのアンテナが干渉してアンテナ特性が低下してしまうという問題がある。   However, there are many cases in which two antennas have to be arranged in close proximity due to the demand for miniaturization of portable radio devices. In this case, as described above, there is a problem in that the antenna characteristics deteriorate due to interference between the two antennas.

本発明は、上述した事情に鑑みてなされたもので、２つのアンテナを筐体内に内蔵するダイバーシティ型の携帯無線機において、２つのアンテナを近接配置させた場合であっても、アンテナ干渉を容易に抑制することができる携帯無線機を提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and in a diversity portable radio device in which two antennas are built in a housing, even when the two antennas are arranged close to each other, antenna interference is easy. It is an object of the present invention to provide a portable wireless device that can be suppressed.

そこで、本発明の携帯無線機は、ダイバーシティ型の携帯無線機であって、
２つのアンテナと、
筐体と、
前記筐体内に設けられ、かつ基準電位部が形成された回路基板とを備え、
前記２つのアンテナは前記筐体内の一方端に配置され、
前記２つのアンテナのうち少なくとも一方のアンテナは前記回路基板上に実装され、
前記一方のアンテナの近傍に、前記基準電位部と電気的に接続された金属部を有する部品が配される。Therefore, the portable wireless device of the present invention is a diversity type portable wireless device,
Two antennas,
A housing,
A circuit board provided in the housing and having a reference potential portion formed thereon,
The two antennas are arranged at one end in the housing,
At least one of the two antennas is mounted on the circuit board,
A component having a metal portion electrically connected to the reference potential portion is disposed in the vicinity of the one antenna.

好適には、前記一方のアンテナは受信用アンテナである。   Preferably, the one antenna is a receiving antenna.

好適には、前記金属部を有する部品は、前記回路基板上に実装された電子部品を覆うように回路基板上に配されたシールドケース、又は前記回路基板に実装されたイヤホンジャック、あるいは前記回路基板に実装されたカード用コネクタである。   Preferably, the component having the metal part is a shield case disposed on the circuit board so as to cover an electronic component mounted on the circuit board, an earphone jack mounted on the circuit board, or the circuit. A card connector mounted on a substrate.

本発明の携帯無線機によれば、携帯無線機を構成する筐体内に配置されたダイバーシティ方式の２つのアンテナうち、一方のアンテナの近傍に、筐体内に設けられた回路基板の基準電位部と電気的に接続された金属部を含む部品を配して前記一方のアンテナのアンテナ利得を劣化させることで、他方のアンテナのアンテナ利得の劣化を低減させることにより、２つのアンテナが干渉して共にアンテナ利得が劣化してしまう事態を回避できる。   According to the portable wireless device of the present invention, among the two diversity antennas arranged in the casing constituting the portable wireless device, in the vicinity of one antenna, the reference potential portion of the circuit board provided in the casing and By disposing an antenna gain of the one antenna by disposing a part including an electrically connected metal part and reducing the antenna gain of the other antenna, both antennas interfere with each other. A situation in which the antenna gain is degraded can be avoided.

これにより、筐体内の一端側に２つのアンテナを配したとしても、ダイバーシティ受信を良好に行うことが可能となる。また、アンテナ配置の自由度、延いては携帯無線機の設計の自由度が拡大されるので、携帯電話機の小型化、薄形化を図ることが可能となる。   Thereby, even if two antennas are arranged on one end side in the housing, diversity reception can be performed satisfactorily. In addition, since the degree of freedom of antenna arrangement and, moreover, the degree of freedom of design of the portable wireless device is expanded, it becomes possible to reduce the size and thickness of the cellular phone.

本発明の一実施形態の携帯電話機の全体を示す外観斜視図である。1 is an external perspective view showing an entire mobile phone according to an embodiment of the present invention. 図１の携帯電話機の構成を示すブロック図である。It is a block diagram which shows the structure of the mobile telephone of FIG. 本発明の一実施形態の携帯電話機における第一筐体の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the 1st housing | casing in the mobile telephone of one Embodiment of this invention. 本発明の一実施形態の携帯電話機における第一筐体の先端部の組立状態を示す斜視図である。It is a perspective view which shows the assembly state of the front-end | tip part of the 1st housing | casing in the mobile telephone of one Embodiment of this invention. 本発明の一実施形態の携帯電話機における第一筐体の先端部の組立状態を示す断面図である。It is sectional drawing which shows the assembly state of the front-end | tip part of the 1st housing | casing in the mobile telephone of one Embodiment of this invention. シールドケースに代えて受信用アンテナにイヤホンジャックを近づけた例を示す斜視図である。It is a perspective view which shows the example which replaced with the shield case and the earphone jack was made close to the receiving antenna. シールドケースに代えて受信用アンテナにカード用コネクタを近づけた例を示す斜視図である。It is a perspective view which shows the example which replaced with the shield case and the card connector was brought close to the receiving antenna.

符号の説明Explanation of symbols

１ 第一筐体
５ 回路基板
５ａ 表面
５ｂ 裏面
６ シールドケース
３１ 送受信用アンテナ
３２ 受信用アンテナDESCRIPTION OF SYMBOLS 1 1st housing | casing 5 Circuit board 5a Front surface 5b Back surface 6 Shield case 31 Transmission / reception antenna 32 Reception antenna

以下、本発明の実施形態に係る携帯無線機について図を参照して説明する。   Hereinafter, a portable wireless device according to an embodiment of the present invention will be described with reference to the drawings.

図１は、本実施形態に係る携帯電話機１００の全体を示す外観斜視図である。   FIG. 1 is an external perspective view showing the entire mobile phone 100 according to the present embodiment.

この携帯電話機１００は、ＣＤＭＡ（Code Division Multiple Access）２０００ １ｘ及びＣＤＭＡ２０００ １ｘ ＥＶＤＯ（Evolution Data Only）方式の電話機であって、ユーザによる操作を受け付けるキー操作部９等を備えた第一筐体１と、メインディスプレイ１２等を備えた第二筐体１１を備えており、第一筐体１と第二筐体１１とがそれぞれの一端に形成されたヒンジ部２を介して対向可能に折り畳めるように開閉自在に連結されている。   This cellular phone 100 is a CDMA (Code Division Multiple Access) 2000 1x and CDMA2000 1x EVDO (Evolution Data Only) type telephone, and includes a first case 1 including a key operation unit 9 that receives an operation by a user, and the like. A second casing 11 having a main display 12 and the like, and the first casing 1 and the second casing 11 can be folded so as to face each other via a hinge portion 2 formed at one end of each. It is connected to open and close.

第一筐体１は、第一ケース部材３及び第二ケース部材４を有している。第一筐体１のうち、閉状態にて第ニ筐体１１と対向する対向面１ａには通話キーや終話キー等を有するキー操作部９が露出して設けられ、このキー操作部９の下方にマイクロフォン７が配置されている。第一筐体１の外面の一部は蓋部材３ａにより形成され、その内部に二次電池８（図３参照）が収納されている。   The first housing 1 has a first case member 3 and a second case member 4. A key operation unit 9 having a call key, a call end key, and the like is exposed on the facing surface 1a of the first case 1 facing the second case 11 in the closed state. A microphone 7 is arranged below the. A part of the outer surface of the first housing 1 is formed by a lid member 3a, in which a secondary battery 8 (see FIG. 3) is housed.

第二筐体１１には、閉状態にて第一筐体１と対向する対向面１１ａに液晶ディスプレイ、有機ＥＬディスプレイ、無機ＥＬディスプレイ等からなるメインディスプレイ１２が露出して配置され、このメインディスプレイ１２の上方にスピーカ１３が配置されている。   In the second casing 11, a main display 12 composed of a liquid crystal display, an organic EL display, an inorganic EL display, etc. is exposed on the facing surface 11a facing the first casing 1 in the closed state. A speaker 13 is disposed above 12.

また、スピーカ１３の左右にはクッション材１４がそれぞれ突出した状態で取付けられており、このクッション材１４によって、第一筐体１と第二筐体１１とを閉作動させた際に、第一筐体１と第二筐体１１とが直接接触することを防止するようになっている。   Further, cushion members 14 are attached to the left and right of the speaker 13 in a protruding state. When the first housing 1 and the second housing 11 are closed by the cushion material 14, the first member 1 is closed. The housing 1 and the second housing 11 are prevented from coming into direct contact.

図２は、図１に示す携帯電話機１００の構成を示すブロック図である。   FIG. 2 is a block diagram showing a configuration of mobile phone 100 shown in FIG.

携帯電話機１００は、携帯電話機を統括的に制御するＣＰＵ等の制御部２１、キー操作部９、メインディスプレイ１２、マイクロフォン７及びスピーカ１３に接続されて音声信号を処理する音声処理部２２、無線通信部３０等を備えている。   The cellular phone 100 is connected to a control unit 21 such as a CPU for comprehensively controlling the cellular phone, a key operation unit 9, a main display 12, a microphone 7 and a speaker 13, and an audio processing unit 22 for processing an audio signal, wireless communication Part 30 and the like.

無線通信部３０は、ダイバーシティ受信を行うものであって、送受信用アンテナ３１と受信用アンテナ３２を備える。送受信用アンテナ３１は、両アンテナ３１，３２の切り替えを行う高周波スイッチ３３、アンテナ共用器３４、第一受信回路３５、送信回路３６を介して通信処理部３７に接続されている。受信用アンテナ３２は、高周波スイッチ３３及び第二受信回路３９を介して通信処理部３７に接続されている。   The wireless communication unit 30 performs diversity reception, and includes a transmission / reception antenna 31 and a reception antenna 32. The transmission / reception antenna 31 is connected to a communication processing unit 37 via a high-frequency switch 33 that switches between both antennas 31 and 32, an antenna duplexer 34, a first reception circuit 35, and a transmission circuit 36. The receiving antenna 32 is connected to the communication processing unit 37 via the high frequency switch 33 and the second receiving circuit 39.

このような構成により、ＣＤＭＡ２０００ １ｘ ＥＶＤＯ方式にて、アンテナ３１，３２が不図示の基地局からの無線電波を受信すると、通信処理部３７は両アンテナ３１，アンテナ３２を介して第一受信回路３５及び第二受信回路３９に入力された無線信号を合成して、その無線信号を処理するようになっている。   With such a configuration, when the antennas 31 and 32 receive radio waves from a base station (not shown) in the CDMA2000 1x EVDO system, the communication processing unit 37 receives the first receiving circuit 35 via both the antennas 31 and 32. The radio signals input to the second receiving circuit 39 are synthesized and the radio signals are processed.

また、通信処理部３７は、送信回路３６、アンテナ共用器３４、高周波スイッチ３３及び送受信用アンテナ３１を介して基地局に無線信号を送信するようになっている。   The communication processing unit 37 transmits a radio signal to the base station via the transmission circuit 36, the antenna duplexer 34, the high frequency switch 33, and the transmission / reception antenna 31.

図３は、図１に示す携帯電話機の第一筐体の詳細構造を示す分解斜視図である。   FIG. 3 is an exploded perspective view showing a detailed structure of the first housing of the mobile phone shown in FIG.

第一筐体１の内部には、回路基板５、シールドケース（金属部を含む部品）６、キー操作部９が設けられている。なお、参照番号８は第一ケース部材３と蓋部材３ａとの間に形成された空間に収容された二次電池８である。   Inside the first housing 1, a circuit board 5, a shield case (a part including a metal part) 6, and a key operation unit 9 are provided. Reference numeral 8 denotes a secondary battery 8 accommodated in a space formed between the first case member 3 and the lid member 3a.

回路基板５には、集積回路、抵抗器、コンデンサー等の電子部品が実装され、それら部品間を接続する接続配線パターンと基準電位パターン（グランドパターン）が形成されている。更に、回路基板５には、受信用アンテナ３２が実装されている（図４（ｂ），５参照）。   On the circuit board 5, electronic components such as an integrated circuit, a resistor, and a capacitor are mounted, and a connection wiring pattern and a reference potential pattern (ground pattern) for connecting the components are formed. Further, a receiving antenna 32 is mounted on the circuit board 5 (see FIGS. 4B and 5).

シールドケース６は、回路基板５の表面５ａ（キー操作部９側の面）を覆う大きさを有する平板状をした金属製の天板９ａと、導電膜を被覆した樹脂からなり、前記天板９ａより垂直に突出するように設けられた複数の壁部９ｂとからなる導電性をもった箱状の部材であって、回路基板５を挟んで二次電池８の反対側に配置されて回路基板５の表面５ａ（キー操作部９側の面）を覆うように配置されている。   The shield case 6 is made of a plate-shaped metal top plate 9a having a size covering the surface 5a (the surface on the key operation unit 9 side) of the circuit board 5, and a resin coated with a conductive film. A box-shaped member having a plurality of wall portions 9b provided so as to protrude vertically from 9a, and disposed on the opposite side of the secondary battery 8 with the circuit board 5 interposed therebetween. It arrange | positions so that the surface 5a (surface by the side of the key operation part 9) of the board | substrate 5 may be covered.

シールドケース６は、回路基板５に対して複数箇所でネジ止めされると共に、回路基板５の基準電位部（グランド部）に電気的に接続される。これにより回路基板５の表面５ａに実装された電子部品が電磁波等によって外乱を受けるのを防止するようになっている。そして、回路基板５とこの回路基板５に取り付け固定されたシールドケース６、及びシールドケース６の天板９ａ上に設けられたキー操作部９とは、対向状態で接合される第一ケース部材３と第二ケース部材４とで形成される空間内に配されている。   The shield case 6 is screwed to the circuit board 5 at a plurality of locations and is electrically connected to a reference potential portion (ground portion) of the circuit board 5. This prevents the electronic component mounted on the surface 5a of the circuit board 5 from being disturbed by electromagnetic waves or the like. The circuit board 5, the shield case 6 attached and fixed to the circuit board 5, and the key operation unit 9 provided on the top plate 9 a of the shield case 6 are joined in a facing state. And the second case member 4.

なお、シールドケース６を構成する天板９ａを金属により形成し、壁部９ｂを導電膜で被覆した樹脂により形成した例を示したが、全体的に導電性を有していれば良く、例えば、シールドケース６全体を金属により形成しても良く、あるいは天板９ａ及び壁部９ｂを樹脂で一体的に形成し、その後、全体に導電膜を被覆したものであっても構わない。特に、シールドケース６全体を導電膜で被覆した樹脂により形成することで、全体の重量を抑えることができるため、携帯電話機１００をより計量化することができる。   In addition, although the example which formed the top plate 9a which comprises the shield case 6 with the metal, and formed the resin which coat | covered the wall part 9b with the electrically conductive film was shown, it should just have electroconductivity as a whole, for example, The entire shield case 6 may be made of metal, or the top plate 9a and the wall 9b may be integrally formed of resin, and then the entire surface may be covered with a conductive film. In particular, since the entire weight of the shield case 6 is made of a resin coated with a conductive film, the weight of the entire mobile phone 100 can be reduced.

また、図４（ａ）に第一筐体の先端部（一端部）の組立状態を示す斜視図を、図４（ｂ）に第一筐体の先端部（一端部）の断面図をそれぞれ示すように、回路基板５は、第一筐体１の内部の先端部（一端部）にまで配置されている。また、第一筐体１の内部のうち、その先端と回路基板５との間の空間には、送受信用アンテナ３１が配置されている。   4A is a perspective view showing the assembled state of the front end (one end) of the first housing, and FIG. 4B is a cross-sectional view of the front end (one end) of the first housing. As shown, the circuit board 5 is disposed up to the tip (one end) inside the first housing 1. In addition, a transmission / reception antenna 31 is disposed in the space between the tip of the first housing 1 and the circuit board 5.

回路基板５における送受信用アンテナ３１の近くには、回路基板５に実装された受信用アンテナ３２が配置されている。   A reception antenna 32 mounted on the circuit board 5 is disposed near the transmission / reception antenna 31 on the circuit board 5.

そして、図４（ｂ）に見られるように、回路基板５上に実装された受信用アンテナ３２は、回路基板５の基準電位部と電気的に接続されたシールドケース６によって覆われるようになっている。即ち、受信用アンテナ３２の近傍には、回路基板５の基準電位部と電気的に接続されたシールドケース６を配した構成としてある。   As shown in FIG. 4B, the receiving antenna 32 mounted on the circuit board 5 is covered with a shield case 6 electrically connected to the reference potential portion of the circuit board 5. ing. In other words, in the vicinity of the receiving antenna 32, the shield case 6 electrically connected to the reference potential portion of the circuit board 5 is arranged.

即ち、送受信用アンテナ３１及び受信用アンテナ３２は、同一周波数帯又は近傍の周波数帯にアンテナ利得を有している。このような両アンテナ３１，３２が近接配置されると、両アンテナ３１，３２同士が互いに電磁的に結合してしまうことで、アンテナ利得が互いに劣化してしまう。つまり、両アンテナ３１，３２同士が結合してしまう現象が発生し、互いに送信電波や受信電波が分散されてしまい、単体で使用する場合に比べてもアンテナ利得が劣化する。   That is, the transmission / reception antenna 31 and the reception antenna 32 have antenna gains in the same frequency band or a nearby frequency band. If both the antennas 31 and 32 are arranged close to each other, the antenna gains deteriorate due to electromagnetic interference between the antennas 31 and 32. That is, a phenomenon occurs in which both antennas 31 and 32 are coupled to each other, and the transmission radio wave and the reception radio wave are dispersed with each other, and the antenna gain is deteriorated even when used alone.

そこで、図４（ｂ）に示すように、受信用アンテナ３２の近傍に、回路基板５の基準電位部と電気的に接続されたシールドケース６を配置する。これにより、受信用アンテナ３２のアンテナ利得は劣化するものの、送受信用アンテナ３１のアンテナ利得の劣化を低減することができる。即ち、受信用アンテナ３２のアンテナ利得を予め劣化させておくことにより、受信用アンテナ３２と送受信用アンテナ３１との干渉が抑えられて、送受信用アンテナ３１のアンテナ利得の劣化が低減されることにより、両アンテナの利得が劣化することを防止することができる。   Therefore, as shown in FIG. 4B, the shield case 6 electrically connected to the reference potential portion of the circuit board 5 is disposed in the vicinity of the receiving antenna 32. Thereby, although the antenna gain of the receiving antenna 32 deteriorates, the deterioration of the antenna gain of the transmitting / receiving antenna 31 can be reduced. That is, by previously deteriorating the antenna gain of the receiving antenna 32, interference between the receiving antenna 32 and the transmitting / receiving antenna 31 is suppressed, and deterioration of the antenna gain of the transmitting / receiving antenna 31 is reduced. It is possible to prevent the gains of both antennas from deteriorating.

したがって、携帯電話機１００は、２つのアンテナ３１，３２を用いたダイバーシティ受信を良好に行うことが可能となる。また、２つのアンテナ３１，３２を１つの筐体１内において近接配置させることができるので、携帯電話機１００の小型化、薄形化を図ることが可能となる。   Therefore, the cellular phone 100 can perform diversity reception using the two antennas 31 and 32 satisfactorily. In addition, since the two antennas 31 and 32 can be arranged close to each other in the single housing 1, the mobile phone 100 can be reduced in size and thickness.

特に、受信用アンテナ３２は受信専用であり、送受信用アンテナ３１のように送信にも使用することはないため、ダイバーシティ効果を得るために送受信用アンテナ３１ほどのアンテナ利得は必要ない。その為、シールドケース６は受信用アンテナ３２に近づけることが好ましい。   In particular, the reception antenna 32 is dedicated for reception and is not used for transmission like the transmission / reception antenna 31. Therefore, the antenna gain as high as that of the transmission / reception antenna 31 is not required to obtain the diversity effect. Therefore, the shield case 6 is preferably close to the receiving antenna 32.

ただし、受信用アンテナ３２にシールドケース６を近づけ過ぎると、放射が遮断されたり、又は基準電位部との結合によりアンテナとして機能しなくなったりするため、ダイバーシティ効果が得られる最低限度のアンテナ利得が得られる範囲で適宜近づけることが好ましい。   However, if the shield case 6 is too close to the receiving antenna 32, radiation is cut off or the antenna does not function as an antenna due to coupling with the reference potential section, so that a minimum antenna gain that can achieve a diversity effect is obtained. It is preferable to approach as close as possible within the range.

図５は、シールドケースに代えて受信用アンテナにイヤホンジャックを近づけた例を示す斜視図であり、図６は、シールドケースに代えて受信用アンテナにカード用コネクタを近づけた例を示す斜視図である。   FIG. 5 is a perspective view showing an example in which the earphone jack is brought close to the receiving antenna instead of the shield case, and FIG. 6 is a perspective view showing an example in which the card connector is brought close to the receiving antenna instead of the shield case. It is.

図５及び図６は、受信用アンテナ３２が実装された表面５ａと反対側の裏面５ｂであって、受信用アンテナ３２と対向する位置にイヤホンジャック４１又はカード用コネクタ４５を実装配置したものである。即ち、イヤホンジャック４１やカード用コネクタ４５は、接続配線パターンに接続されると共に、基準電位パターンとも接続される金属部４１ａ，４５ａを具備しており、受信アンテナ３２の近傍に基準電位パターンと電気的に接続された金属部を配置することができる。このように、イヤホンジャック４１やカード用コネクタ４５を受信用アンテナ３２の近傍に配置することによってもシールドケース６での例と同様に受信用アンテナ３２のアンテナ利得は低下させることができ、これにより受信用アンテナ３２と送受信用アンテナ３１との干渉を抑え、送受信用アンテナ３１のアンテナ利得の劣化が低減されるので、両アンテナ３１，３２の利得が劣化することを防止することができる。   5 and 6 show a back surface 5b opposite to the front surface 5a on which the receiving antenna 32 is mounted, in which an earphone jack 41 or a card connector 45 is mounted and disposed at a position facing the receiving antenna 32. FIG. is there. That is, the earphone jack 41 and the card connector 45 are provided with metal portions 41a and 45a that are connected to the connection wiring pattern and also connected to the reference potential pattern. Connected metal parts can be arranged. In this way, by arranging the earphone jack 41 and the card connector 45 in the vicinity of the receiving antenna 32, the antenna gain of the receiving antenna 32 can be reduced similarly to the example of the shield case 6. Since interference between the receiving antenna 32 and the transmitting / receiving antenna 31 is suppressed and deterioration of the antenna gain of the transmitting / receiving antenna 31 is reduced, it is possible to prevent the gains of both the antennas 31 and 32 from being deteriorated.

なお、この場合、受信アンテナ３２のアンテナ利得の低下が大きくなり過ぎないようにするために、シールドケース６のうち受信用アンテナ３２が設けられた部位を切り欠くか、あるいは非導電性としておくことが好ましい。   In this case, in order to prevent a decrease in the antenna gain of the receiving antenna 32 from becoming excessively large, a portion of the shield case 6 where the receiving antenna 32 is provided is cut out or made nonconductive. Is preferred.

以上、上述した実施形態において示した各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。   As described above, the shapes, combinations, and the like of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

例えば、上述した実施形態では受信用アンテナ３２の近傍に配置する金属部を含む部品としてシールドケース６、イヤホンジャック４１、カード用コネクタ４５等を用いた例を示したが、本発明はこれらの部品だけに限定されるものではなく、ネジ、充電端子、時計バックアップ回路のボタン電池など、回路基板の基準電位部と電気的に接続された金属部を含む部品であれば良い。また、受信アンテナ３２におけるアンテナ利得を低下させる度合いは、金属部の大きさや受信用アンテナ３２からの距離、さらには送受信用アンテナ３１と受信用アンテナ３２との距離により、受信用アンテナ３２のアンテナ利得の劣化の程度が規定されるため、ダイバーシティ効果が得られる最低限度のアンテナ利得が得られる範囲で適宜設定すれば良い。   For example, in the above-described embodiment, an example in which the shield case 6, the earphone jack 41, the card connector 45, and the like are used as the parts including the metal portion disposed in the vicinity of the reception antenna 32 has been described. However, the present invention is not limited thereto, and any component including a metal part electrically connected to the reference potential part of the circuit board, such as a screw, a charging terminal, and a button battery of a clock backup circuit, may be used. The degree of reduction in the antenna gain in the receiving antenna 32 depends on the size of the metal part, the distance from the receiving antenna 32, and the distance between the transmitting and receiving antenna 31 and the receiving antenna 32. Since the degree of degradation is defined, it may be set as appropriate within a range in which the minimum antenna gain that can achieve the diversity effect is obtained.

また、ダイバーシティ受信の方式としては、２つのアンテナの受信信号のＳ／Ｎ比などを比較して、通信処理部３７において各受信信号の重み付けを最適化することによって受信を行うＣＤＭＡ２０００ ＥＶＤＯにおいて説明したが、例えば、Ｗ−ＣＤＭＡ ＨＳＤＰＡ（High Speed Data Packet Access）等にも適用することができる。   The diversity reception method is described in CDMA2000 EVDO that performs reception by comparing the S / N ratio of the reception signals of the two antennas and optimizing the weighting of each reception signal in the communication processing unit 37. However, it can also be applied to, for example, W-CDMA HSDPA (High Speed Data Packet Access).

また、２つのアンテナ３１，３２が内蔵される筐体としては、第一筐体１に限らず、第二筐体１１であってもよい。   Further, the housing in which the two antennas 31 and 32 are built is not limited to the first housing 1 but may be the second housing 11.

また、筐体の先端部に限らず、側端部等であってもよい。いずれの場合であっても、２つのアンテナ３１，３２が近接しており、アンテナ間干渉が発生する場合であれば、本発明を適用することが可能である。   Moreover, not only the front-end | tip part of a housing | casing but a side edge part etc. may be sufficient. In any case, the present invention can be applied if the two antennas 31 and 32 are close to each other and interference between the antennas occurs.

さらに、上述した実施形態では、携帯電話機１００について説明したが、これに限らない。ダイバーシティ受信を行う無線部を備える携帯電子機器であれば、例えばＰＤＡ（Personal Digital Assistants）などであってもよい。
本出願は、2006年2月24日出願の日本特許出願（特願2006−049061）に基づくものであり、その内容はここに参照として取り込まれる。Furthermore, although the mobile phone 100 has been described in the above-described embodiment, the present invention is not limited to this. For example, a PDA (Personal Digital Assistants) may be used as long as it is a portable electronic device that includes a wireless unit that performs diversity reception.
This application is based on a Japanese patent application filed on Feb. 24, 2006 (Japanese Patent Application No. 2006-04-9061), the contents of which are incorporated herein by reference.

Claims (4)

ダイバーシティ型の携帯無線機であって、
一方のアンテナは受信用アンテナであり、他方のアンテナは送受信用アンテナである、２つのアンテナと、
筐体と、
前記筐体内に設けられ、かつ基準電位部が形成された回路基板と、
前記受信用アンテナと、前記送受信用アンテナを用いてダイバーシティ受信を行う無線通信部と、を備え、
前記２つのアンテナは前記筐体内の一方端に配置され、
前記２つのアンテナのうち少なくとも前記受信用アンテナは前記回路基板上に実装され、
前記受信用アンテナの近傍に、前記基準電位部と電気的に接続された金属部を有する部品が配されることにより、
前記受信用アンテナの利得が低減することを特徴とする携帯無線機。A diversity-type portable wireless device,
One antenna is a receiving antenna, the other antenna is a transmitting / receiving antenna, two antennas,
A housing,
A circuit board provided in the housing and having a reference potential portion formed thereon;
A radio communication unit that performs diversity reception using the reception antenna and the transmission / reception antenna;
The two antennas are arranged at one end in the housing,
At least the receiving antenna of the two antennas is mounted on the circuit board,
In the vicinity of the receiving antenna, a component having a metal part electrically connected to the reference potential part is arranged ,
A portable wireless device characterized in that a gain of the receiving antenna is reduced . 前記金属部を有する部品は、前記回路基板に実装された電子部品を覆うように前記回路基板上に配されたシールドケースであることを特徴とする請求項１に記載の携帯無線機。The portable wireless device according to claim 1 , wherein the component having the metal part is a shield case disposed on the circuit board so as to cover an electronic component mounted on the circuit board . 前記金属部を有する部品は、前記回路基板に実装されたイヤホンジャックであること特徴とする請求項１に記載の携帯無線機。Parts, portable wireless device according to claim 1, wherein said a earphone jack mounted on a circuit board having the metal portion. 前記金属部を有する部品は、前記回路基板に実装されたカード用コネクタであること特徴とする請求項１に記載の携帯無線機。Parts, portable wireless device according to claim 1, wherein it is a connector card mounted on the circuit board having the metal portion.
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